What are the side effects of haloperidol?

Donna Hill Howes, RN
Family Practitioner

The most common side effects of haloperidol involve the central nervous system and may be severe. These include trouble staying still, repetitive involuntary movements, abnormal postures, drowsiness, and increased salivation. Some people have developed neuroleptic malignant syndrome. Symptoms include rigid muscles, fever, and delirium.

Other side effects include insomnia, anxiety, agitation, depressed mood, headaches, confusion, a sensation of spinning, dry mouth, blurry vision and other eye problems, nausea, vomiting, constipation, and not being able to urinate. People who take this drug may have a rapid heartbeat, and changes in heart rhythm and blood pressure. Their skin may become sensitive to light and a rash may develop. Haloperidol can make it dangerous to drive or to operate machinery.

This answer was adapted from Sharecare's award-winning AskMD app. Start a consultation now to find out what's causing your symptoms, learn how to manage a condition, or find a doctor.

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